Evaluation method of military aircraft noise using AI analysis of aircraft images

2021 ◽  
Vol 263 (6) ◽  
pp. 854-862
Author(s):  
Etsushi Fujita ◽  
Taichi Higashioka ◽  
Manabu Sugiura ◽  
Osamu Kohashi
Keyword(s):  
Evaluation Method ◽  
Aircraft Noise ◽  
Military Aircraft ◽  
Tokyo Metropolitan Area ◽  
Aircraft Model ◽  
The Past ◽  
Noise Characteristics ◽  
Noise Data ◽  
Advanced Analysis ◽  
Commercial Aircrafts

In recent aircraft noise survey in Japan, noise data is associated with each aircraft by flight log or by radio information including transponder signals. Especially, above Tokyo metropolitan area, flight tracks are tangled extremely each other, therefore assessments from various perspectives such as departure / arrival airport, used runway, aircraft model, and operator have been demanded for determining noise policies. However, for military aircrafts, it is not easy to identify their information with the same way as commercial aircrafts, because their flight logs are not disclosed and many of them do not emit transponder signals like commercial aircrafts. Therefore, manned 24 hours survey around air bases have been necessary to obtain flight information of military aircrafts. In this paper, we propose an AI-based analysis using captured aircraft images for obtaining actual flight data of military aircrafts. In the past trials, we could determine the takeoff/landing time and the aircraft model by the above method. Associating these information and noise data measured at monitoring stations, details of noise characteristics around the air base can be clearly grasped. Advanced analysis of the causes of noise impact will lead effective and concrete countermeasures.

Effect of Variations in Weight or Normal Acceleration on the Ceiling of Jet-Propelled Aircraft

1955 ◽  
Vol 59 (534) ◽  
pp. 435-437
Author(s):  
P. L. Sutcliffe
Keyword(s):  
High Altitude ◽  
Normal Force ◽  
Control Surface ◽  
Military Aircraft ◽  
Longitudinal Control ◽  
The Past ◽  
Normal Acceleration

The ability to manoeuvre at high altitude has become one of the main requirements in the design of modern military aircraft. Ability to manoeuvre enables the fighter pilot to execute tight turns during the attack on a bomber and the bomber pilot to perform evasive manoeuvres and so make the task of the fighter more difficult.Normally the main manoeuvre considered is the application of increased normal acceleration, or g, and if we assume that (a) there is sufficient pitching power available from the longitudinal control surface to increase the wing incidence to give the necessary increase in normal force, and (b) that the new wing incidence is below the stalling incidence of the wing, then the degree of manoeuvrability available is a function of thrust and drag alone. In the past the manoeuvrability required at a given altitude has been expressed in terms of the rate of climb available at that altitude and thus we have such definitions as “ the 1,000 ft./min. ceiling ” and so on.

scholarly journals Exposure to Road, Railway, and Aircraft Noise and Arterial Stiffness in the SAPALDIA Study: Annual Average Noise Levels and Temporal Noise Characteristics

2017 ◽  
Vol 125 (9) ◽  
pp. 097004 ◽  
Author(s):  
Maria Foraster ◽  
Ikenna C. Eze ◽  
Emmanuel Schaffner ◽  
Danielle Vienneau ◽  
Harris Héritier ◽  
...  
Keyword(s):  
Arterial Stiffness ◽  
Aircraft Noise ◽  
Noise Levels ◽  
Annual Average ◽  
Temporal Noise ◽  
Noise Characteristics

Evaluating Augmented and Virtual Reality in Education Through a User-Centered Comparative Study

2020 ◽  
pp. 229-261 ◽  
Author(s):  
Roberto Pierdicca ◽  
Emanuele Frontoni ◽  
Maria Paola Puggioni ◽  
Eva Savina Malinverni ◽  
Marina Paolanti
Keyword(s):  
Virtual Reality ◽  
Comparative Study ◽  
Cultural Heritage ◽  
Evaluation Method ◽  
Smart Devices ◽  
Learning Approaches ◽  
Computational Power ◽  
Real Effect ◽  
The Past ◽  
Education Process

Augmented and virtual reality proved to be valuable solutions to convey contents in a more appealing and interactive way. Given the improvement of mobile and smart devices in terms of both usability and computational power, contents can be easily conveyed with a realism level never reached in the past. Despite the tremendous number of researches related with the presentation of new fascinating applications of ancient goods and artifacts augmentation, few papers are focusing on the real effect these tools have on learning. Within the framework of SmartMarca project, this chapter focuses on assessing the potential of AR/VR applications specifically designed for cultural heritage. Tests have been conducted on classrooms of teenagers to whom different learning approaches served as an evaluation method about the effectiveness of using these technologies for the education process. The chapter argues on the necessity of developing new tools to enable users to become producers of contents of AR/VR experiences.

Evaluation of ontology structural metrics based on public repository data

2019 ◽  
Vol 21 (2) ◽  
pp. 473-485
Author(s):  
Manuel Franco ◽  
Juana María Vivo ◽  
Manuel Quesada-Martínez ◽  
Astrid Duque-Ramos ◽  
Jesualdo Tomás Fernández-Breis
Keyword(s):  
Evaluation Method ◽  
Measurement Instrument ◽  
Public Repository ◽  
Standard Methods ◽  
The Past ◽  
Biological Ontologies ◽  
Quality Aspects ◽  
Ontology Metrics ◽  
The Stability ◽  
Structural Metrics

Abstract The development and application of biological ontologies have increased significantly in recent years. These ontologies can be retrieved from different repositories, which do not provide much information about quality aspects of the ontologies. In the past years, some ontology structural metrics have been proposed, but their validity as measurement instrument has not been sufficiently studied to date. In this work, we evaluate a set of reproducible and objective ontology structural metrics. Given the lack of standard methods for this purpose, we have applied an evaluation method based on the stability and goodness of the classifications of ontologies produced by each metric on an ontology corpus. The evaluation has been done using ontology repositories as corpora. More concretely, we have used 119 ontologies from the OBO Foundry repository and 78 ontologies from AgroPortal. First, we study the correlations between the metrics. Second, we study whether the clusters for a given metric are stable and have a good structure. The results show that the existing correlations are not biasing the evaluation, there are no metrics generating unstable clusterings and all the metrics evaluated provide at least reasonable clustering structure. Furthermore, our work permits to review and suggest the most reliable ontology structural metrics in terms of stability and goodness of their classifications. Availability: http://sele.inf.um.es/ontology-metrics

Acoustic validation of military aircraft noise models

2019 ◽  
Vol 145 (3) ◽  
pp. 1680-1681
Author(s):  
Alan T. Wall ◽  
Frank S. Mobley
Keyword(s):  
Aircraft Noise ◽  
Military Aircraft ◽  
Noise Models

scholarly journals Three-Way Spectral Decompositions of High-Performance Military Aircraft Noise

AIAA Journal ◽  
2019 ◽  
Vol 57 (8) ◽  
pp. 3467-3479 ◽  
Author(s):  
Tracianne B. Neilsen ◽  
Aaron B. Vaughn ◽  
Kent L. Gee ◽  
S. Hales Swift ◽  
Alan T. Wall ◽  
...  
Keyword(s):  
High Performance ◽  
Aircraft Noise ◽  
Military Aircraft ◽  
Spectral Decompositions

scholarly journals Validity Of aircraft noise data

1974 ◽  
Vol 55 (S1) ◽  
pp. S48-S48
Author(s):  
W. C. Storey ◽  
R. Yates ◽  
C. A. Sekyra
Keyword(s):  
Aircraft Noise ◽  
Noise Data

Military Aircraft Noise

1975 ◽  
Vol 12 (8) ◽  
pp. 653-657 ◽  
Author(s):  
Paul A. Shahady
Keyword(s):  
Aircraft Noise ◽  
Military Aircraft

Development and Validation of Evaluation Method on Hypothetical Total Instantaneous Flow Blockage in Sodium-Cooled Fast Reactors and its Application to a Middle Size SFR

2017 ◽  
Author(s):  
Yoshitaka Fukano
Keyword(s):  
Control System ◽  
Power Control ◽  
Evaluation Method ◽  
Safety Evaluation ◽  
Past Study ◽  
Fast Reactors ◽  
Instantaneous Flow ◽  
The Past ◽  
Power Control System ◽  
Flow Blockage

Local faults (LFs) have been considered to be of greater importance in safety evaluation in sodium-cooled fast reactors (SFRs) because fuel elements were generally densely arranged in the subassemblies (SAs) in this type of reactors, and because power densities were higher compared with those in light water reactors. A hypothetical total instantaneous flow blockage at the coolant inlet of an SA (HTIB) gives most severe consequences among a variety of flow blockages. Although an evaluation on the consequences of HTIB using SAS4A code was also performed in the past study, SAS4A code was further developed by implementing analytical model of power control system in this study. An evaluation on the consequences of HTIB in Monju by this developed SAS4A code was performed in this study. Furthermore SAS4A code was newly validated using an in-pile experiment which simulated HTIB events. The validity of SAS4A application to safety evaluation on the consequence of HTIB was further enhanced in this study. It was clarified by the analyses considering power control system that the reactor would be safely shut down by the PPS triggered by either of 116% over power or DND trip signals. Therefore the conclusion in the past study that the consequences of HTIB would be much less severe than that of ULOF was strongly supported by this study.

scholarly journals The UFO Encyclopedia: The Phenomena from the Beginning (3rd ed., 2 vol.) by Jerome Clark

2020 ◽  
Vol 34 (1) ◽  
pp. 137-140
Author(s):  
John B. Alexander
Keyword(s):  
Department Of Defense ◽  
Chief Editor ◽  
Policy Position ◽  
Military Aircraft ◽  
The Past ◽  
Print Medium ◽  
Rapid Pace ◽  
Considerable Depth ◽  
International Phenomenon ◽  
The U.S

With more than 1500 pages, this is a massive undertaking by SSE Dinsdale Award winner, Jerry Clark. This two-volume third edition is buttressed by his decades of research in the field of UFOs. For this encyclopedic effort he is supported by several competent researchers with international reputations. Typically, my reviews of written works by SSE members tend to be quite favorable as I recognize the difficulty of getting our research into print. This work definitely left me conflicted in an attempt to be both fair to the authors and to the potential readers. In general, the material that is included does provide considerable depth to the cases selected for presentation. As this is the third edition, much of that material has been previously published. Clark and his colleagues have in-depth knowledge of many of the earlier cases and these are well represented. What I found most troubling were some glaring omissions that are hard to reconcile with an encyclopedia that suggests it is comprehensive in nature, as opposed to a representation of cases as selected by the chief editor. Absent is the more recent incidences and evidence that have dramatically altered the entire field of UFOlogy. Given the rapid pace of advancement of knowledge, especially since December 2017, it would be nearly impossible for any print medium to keep pace. Here I am addressing the remarkable revelations by the U.S. Department of Defense concerning interactions between military aircraft and unknown objects. Internally these were so significant as to cause the U.S. Navy to publicly publish a policy position acknowledging these events were occurring frequently. However, it is more than the events of just the past two years that are omitted or downplayed. As a prime example, Phil Corso is not mentioned. In 1997, U.S. Army Lt. Col. Corso’s book The Day After Roswell became an international phenomenon. It dominated much of the conversation in the field. Whether one agrees with Corso or not is irrelevant. His book sold more than any other UFO publication by a great margin and he had significant impact on the field. Thus, both Corso and his book should deserve serious consideration.  

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